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Finding the Fourth Proportional to 157,710.99, 217,638.36 and 89,726.50

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Solution

The fourth proportional to 157,710.99, 217,638.36 and 89,726.50 is: 123,820.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,710.99 : 217,638.36 = 89,726.50 : x
  2. Step 2: Convert to fraction form
    157,710.99/217,638.36 = 89,726.50/x
  3. Step 3: Cross multiply
    157,710.99x = 217,638.36 × 89,726.50
  4. Step 4: Simplify right side
    157,710.99x = 19,527,928,372.97
  5. Step 5: Solve for x
    x = 19,527,928,372.97/157,710.99
  6. Step 6: Final answer
    x = 123,820.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.